Rotary pump.



J. R. KINNBY.

ROTARY PUMP.

, APPLIGATION FILED JULY 18, 1912. nzmwzm JULY 21,1913.

Patented Nov. 25, 1913.

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J. R. KINNEY.

ROTARY PUMP. APPLIUAIION TILED JULY 18, 1912 RENEWED JULY 21,1918.

1,079,562, Patented Nov. 25, 1913.

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flun by UNITED STATES PATENT OFFICE.

JUSTUS R. KINNEY, 0F DORCHESTER, MASSACHUSETTS.

ROTARY PUMP.

Specification of Letters Patent.

Patented Nov. 25, 1913.

Application filed July 18, 1912, Serial No, 710,255. Renewed July 21, 1913. Serial No. 780,366.

To all whom 27/ may concern:

Be it known that I, J USTUS R. KINNEY, a citizen of the United States of America, and a resident of Dorchester, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Rotary Pumps, of which the following is aspecification.

his invention relates to rotary pumps and has for its object the provision of a device of this character that will operate smoothly and effectively, and at the same time be simple in construction, having comparatively few operating parts.

The invention consists in a rotary eccentric piston having a blade rigidly secured thereto extending through a slot in an oscillating member interposed between the in let and outlet passages to said chamber.

The invention further consists in certain novel features of construction and arrangement of parts which will-be readily under stood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a vertical section of a pump embodying the principles of the present invention, and Fig. 2 represents a longitudinal vertical section of the same, the cutting plane being on line 22 on Fig. 1.

In the drawings, 10 represents a casing supported by the feet 11 and having a cylindrical piston chamber 12 and the inlet and outlet compartments 13 and 14 respectively. A passage 15 forms a means of communication between the inlet compartment 13 and the' piston charn er 12 while a similar passage 16 forms a means of communication between the piston chamber and the outlet compartment. Extending through the piston chamber 12 is a shaft 17 revoluble in bearings 18 in the end plates 19 secured to the casing 10. he shaft 17 has secured thereto within the p'iston chamber 12 two eccentrics 20, these two eccentrics being separated by the divisional wall 21. The eccentrics 20 are keyed to the shaft 17 and revolve therewith. Upon each of the'eccentrics is mounted an annular piston member 22 which is adapted to always contact at one point in its periphery with the cylindrical wall of said piston chamber during the rotation of the shaft 17.

Between the inlet and outlet oompart.

ments 13 and 14 is an abutment 23 the inner the chamber 12 as I moving upwardly,

end 23 of which is slightly outside of the cylindrical wall of the piston chamber 12. In this abutment 22 is formed a cylindrical chamber 24 in which is mounted the oscillating members 25, the outer ends of which are positioned in recesses 26 in the end plates 19 as shown in Fig. 1, while their inner ends abut each other as shown in said figure. Each of the oscillating members 25 has a diametrical slot 27 therethrough to which is accurately fitted theblade 28 rigidly secured to the piston member 22. Theperiphery of each oscillating member 25 contacts with the cylindrical wall of the piston chamber 12 so that the piston member 22 just clears said member 25 as the former rotates in the chamber 12. During the rotation of the piston member 22 the blade 28 will reciprocate and at the same time oscillate about the axis of the member 25. of the chamber 24 extend downwardly to a point that the outer faces of said blade 28 will reach in either direction during the'oscillation thereof. The space between the piston chamber 12 and the end 23 ofthe abutment 423 provides a means for preventing the pocketing of any of the material in the piston 22 revolves.

During the rotation of the piston 22 a portion of the liquid being pumped is forced through the slot 27 when the blade 28 is 7 thereby lubricating that side of the blade 28. The continued opera tion of the pump completely fills with liquid the compartment 29 above the chamber 24 and as the piston 22 in its rotation draws the blade 28 downwardly into the slot 27 a portion of the liquid in this compartment will be carried by said blade28 into said slot thereby lubricating the opposite face of said blade. It is obvious, therefore, that the blade 28 is thoroughly lubricated at all times during its operation.

It is believed that the operation and many advantages of a pump as herein shown and described will be fully apparent without further description.

Having thus described my invention, I claim:

. 1. In a device of the class described, the combination of a casing provided with a cylindrical piston chamber having an inlet passage and an outlet passage communieating therewith, said casing being also provlded with a cylindrical recess lnterposed between said the walls of which are positioned outside the cylindrical wall of said piston chamber; an oscillating slotted member in said recess; and a rotary eccentric piston in said piston chamber provided with a blade rigidly secured thereto extending through and fitting the slot in said oscillating member.

2. In a device of the class described the combination of a casing provided with acylindrical piston chamber having an inlet and outlet passage communicating therewith, said casing being provided with a re- 

